In 2018，the transportation industry in the middle and lower reaches of the Yangtze river economic belt developed steadily，and its transport capacity and structure were further optimized. Based on the latest data of traffic network mileage，transportation capacity，Yangtze river trunk line，port construction and airport group construction，this paper comprehensively analyzes the three-dimensional traffic network construction of the Yangtze river economic belt and the transportation capacity of various means of transportation，and puts forward prospects and suggestions for future development.